Vitreous-coated shingle and the like



H. WARMAN.

VITREOUS COATED SHINGLE AND THE LIKE- APPLICATION FIL ED SEPT. 24 I919.

1,373,21 7a Patented Mar. 29, 1921.

HARA r WARM/11v,

1 face of the article to constitute the or ground coating of the same.

UNETEE HARRY WARE IAN, OF CLEVELAND, OHM).

VITREQUS-COATED SHINGL'E AND THE LIKE.

Specification of Letters Yatent.

Patented Mar 29, 19211.

To (ZZZ whom it may concern:

Be it known that l, HARRY WARMAN, a citizen of the United States ofAmerica, and a resident of Cleveland, in the county or" Cuyahoga, Stateof Ohio, have invented certain new and useful improvements: in Vitreens-Coated Shingles and the like, of which the following is a.specification;

This invention relates to protected sheet metal articles such as roofingshingles, guttering, siding sheets and the like, that exposed to theweather, and has for its object:

To provide a process andv product in which the sheet metal body of a.shingle or like article is faced or protected by a weather resistingcoating adapted to impart a slate like appearance to the article, andwith which a normal flexibility of the article is retained withoutliability to cracking or seaming the coating.

The accompanying drawing is an enlarged fragmentary section of a? coatedsli'ingle embodying. the present invention.

In carrying out the present invention, the sheet metal article afterreceiving the usual initial treatment has applied to its surface orsurfaces a mixture of paste of feldspar, fluorspar, manganese oxid, sodaash, nitrate of soda andborax, preferably in the following proportionsz-Feldspar 2 parts, fluorspar 1:} parts, manganese oxid 1 part, soda ash2% parts, nitrate of soda 1?} parts and borax :1; part. The mixtureformed into a paste with Water is evenly spread on the surprimary Anexterior or outer surface coating of a granular mineral material, suchas ground or crushed slate, quartz, or the like, is evenly spread overthe aforesaid primary or ground coating, after which the preparedarticles are exposed to a drying operation to remove the containedmoisture in the coating or coatings aforesaid.

The next step in the present process involves the firing of thearticlesin a suitable kiln or mufile at a temperature approximat ing 2000 Fahr,the exposure continuing until a very perfect union between said coatingsand bcwveen the ground coating and the surface of the metal body of thearticle has been effected, and with the granular nature of said exteriorcoating still remaining in the outer surface thereof and adapted toafford a granular and very efiective surface appearance to the product.The relativethickness of the metal body and of the respective coatingsis shown on an enlarged scale in the drawing in which, 1 designates themetal body of the article, 2 the coating of the aforesaid vitreousmixture, and 3 the coating of pulverized slate or the like. A materialfeature of the present process involves a gradual diminution of thepenetration of the one coating into the other. And in that the mineralsubstances used in said exterior coating can be selected of any desiredcolor and shade, it is possible to p 0- duce in a ready manner articlesto meet t 1e varied requirements of the trade as to shade, color,- etc.

Having thus fully described my said invention what I claim as new anddesire to secure by Letters Patent, is

As an article of manufacture, a sheet metal plate having an innercoating of vitreous material and an exterior coating of' crushed slate,said coatings being fused together and to the surface of the articles,with the granular nature of the exterior coating still remaining on theouter surface thereof,

substantially as set forth.

Signed at Chicago, of September, 1919.

. HARRY WARMAN.

Illinois, this 22nd day

